Method of making breathing bags

ABSTRACT

An opening is formed in a strip of impervious flexible material near each end, and an inwardly extending recess is formed in each side of the strip midway between its ends. The strip is then folded along a longitudinal center line to register the recesses with each other and the edges of the folded strip are sealed together. An area of the strips extending from the recesses to the fold also is sealed, whereby two bags are formed that are connected by a neck band so that the bags can be suspended against the chest with their folds adjacent each other.

Sept.

L. A. WISE METHOD OF MAKING BREATHING BAGS Original Filed Feb. 19, 1970 2 Sheets-Sheet 1 INVENTOR. LA V7'0/V ,4. W/SE ATTORNEYS.

Sept. 26, 1972 L. A. WISE METHOD OF MAKING BREATHING BAGS Original Filed Feb. 19 1970 2 Sheets-Sheet 2 lNVfA/TOR.

LAYTOA/A. M55

United States Patent 3,694,286 METHOD OF MAKING BREATHING BAGS Layton A. Wise, 292 Franklin Terrace, Washington, Pa. 15301 Original application Feb. 19, 1970, Ser. No. 12,202, now

Patent No. 3,638,648. Divided and this application Mar. 22, 1971, Ser. No. 126,573

Int. Cl. B31b 49/04 US. Cl. 156-211 4 Claims ABSTRACT OF THE DISCLOSURE An opening is formed in a strip of impervious flexible material near each end, and an inwardly extending recess is formed in each side of the strip midway between its ends. The strip then is folded along a longitudinal center line to register the recesses with each other and the edges of the folded strip are sealed together. An area of the strips extending from the recesses to the fold also is sealed, whereby two bags are formed that are connected by a neck band so that the bags can be suspended against the chest with their folds adjacent each other.

This application is a division of my copending patent application, Ser. No. 12,202, filed Feb. 19, 1970, now Pat. No. 3,638,648.

It is an object of this invention to provide a quick, easy and inexpensive method of forming a pair of integrally connected breathing bags that can be hung from around the neck.

The preferred embodiment of the invention is illustrated in the accompanying drawings, in which FIG. 1 is a plan view of the blank from which the bags are formed;

FIG. 2 is a plan view of the blank after it is folded to form the bags; and

FIG. 3 is a front view of breathing apparatus, including the bags, in operative position.

Referring to FIG. 1 of the drawings, a rectangular strip of flexible material that is impervious to air and of the required length and width is cut to provide a blank 1 having an inwardly extending recess 2 in each side midway between its ends. Aluminized rubber is the preferred material. The two recesses are the same size and preferably have curved inner ends. The blank is provided near its opposite ends with a pair of small openings 3, through which air can be breathed into and out of the bags that are to be formed. These two openings preferably are on the longitudinal center line 4 of the blank. A third opening 5 is formed in the blank at one side of the center line, between one end of the blank and the recesses. This opening is for a pressure relief valve.

After the strip has been cut to provide the blank just described, it is folded lengthwise upon itself along its center line so that a double thickness member 7 is produced that is half as wide as the blank, as shown in FIG. 2. The two recesses 2 register with each other to form a single recess. The edges of the blank and the area between the recess and the fold are sealed together by a suitable adhesive 8 or cement. This produces two longitudinally spaced rectangular bags 9 integrally connected by a band 10 at the inner end of recess 2. Before the blank is folded, tubular fittings 11 are mounted in openings 3, and a relief valve 12 is mounted in opening 5.

3,594,286 Patented Sept. 26, 1972 ice After the bags have been formed, their folded edges are swung toward each other in the planes of the bags into substantially parallel relation, as indicated by the arrows in FIG. 2 and as shown in FIG. 3. The length of band 10 that connects the two bags is great enough to permit it to extend around the back of the neck of a person wearing the bags, with the two bags hanging down over his chest. As shown in FIG. 3, the fittings 11 at the lower ends of the bags are connected to openings in the opposite sides of the lower end of an upright air purifying and oxygen genera-ting canister 14 mounted in the back section 15 of a rectangular case by means of screws 16. The canister is provided with an inlet-outlet port in its upper end, to which a flexible breathing hose 17 is attached. Until this apparatus is used, the breathing bags and the hose are folded inside the case, which has a removable cover (not shown) and which is sealed. When the cover is removed and the hose and bags are released, the wearer inserts his head through the space between the bags above the canister and positions the connecting band 10 against the back of his neck, with the smooth surface bags hanging down over his chest and supporting the canister and back section of the case.

I claim:

1. The method of making a pair of integrally connected breathing bags, comprising forming in a strip of impervious flexible material an opening near each end and an inwardly extending recess in each side midway between its ends, folding the strip upon itself along a longitudinal center line to register said recesses with each other, and sealing together the edges of the folded strip and an area of the strip extending from said recesses to the fold in the strip, whereby to form two bags connected by a neck band adapted to extend around the back of the neck and suspend the bags against the chest with the folds in the bags adjacent each other.

2. The method recited in claim 1, in which said openings are located on said center line in positions to face each other when the bags are against the chest of the user.

3. The method recited in claim 1, including sealing together all of the area of the strips between said recesses and said fold.

4. The method recited in claim 3, including locating said openings on said center line and mounting tubular fittings in them.

References Cited UNITED STATES PATENTS 3,638,648 2/1972 Wise 128-202 3,402,711 9/1968 Emerson 128-1422 3,370,585 2/1968 Oneill 128-1422 3,367,819 2/1968 Schlag 156-227 3,348,476 10/ 1967 Brownlee et al. 156-217 2,947,653 8/1960 Fohr 156-217 2,906,262 9/1959 Braunstein 128-1422 2,902,031 9/1959 Gagnan 128-1422 2,852,023 9/ 1958 Hamilton et a1 128-203 2,564,462 8/1951 Brady et al. 156-227 ALFRED L. LEAVITT, Primary Examiner D. G. GLANTZ, Assistant Examiner US. Cl. X.R.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,69L 286 Dated September 26,1972

V Inventor(s) Layton A. W180 It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Beneath the inventor's name in the first column insert Signed and sealed this 13th day of March1973.

(SEAL) Attest:

ROBERT GOTTSCHALK EDWARD M.FLETCHER,JR.

Commissioner of Patents Attesting Officer FM'M F o-W50 10-69! USCOMM-DC 6O376-P69 u.s eovsnumzm PRINTING omcs; was 0-366-33n 

